Dramatization of the spring suspension in the modern automobile, explaining in detail the principle of "knee action."
04:37:02:11 Hot-air balloon tethered to the ground lifts off, ropes dangling from the balloon; VS hot air balloon flying in the air; aerials of the hot air balloon.
04:37:41:06 Camera zooms out from CU of spinning globe in a black set; shot dissolves into an apple with a postage stamp with a ship on it held in disembodied hand.
04:38:16:01 Great profile shot man driving woman in car; moving projection in background special effect to make car appear to be moving as in a tracking shot.
04:38:28:05 CU toy model of a car with metal discs for tires filmed in profile in front of moving backdrop with great 1930s futuristic modernist architectural models to give car appearance of movement.
04:38:42:01 Aerial of what appear to be Arizona canyons, probably the Grand Canyon.
04:38:49:20 MS White actress dressed as a Southwestern Native American places a grass mat on her head before placing a jar on her head.
04:39:07:06 CU wood wagon wheels riding over rugged dirt road; two frontiersmen in front of covered wagon pulled by horses.
04:39:19:25 Great shot cute boy about 7 years old wearing close-fitting cap and overalls pulling a cute little blonde girl in a radio flyer wagon over a brick road; car and old trucks parked along street; MS little girl bouncing in back of the wagon while sticking her tongue out drooling on her food as she tries to eat a piece of bread with jam, jam is smeared on little girls face.
04:39:26:24 Great shot antique speed boat numbered 99 races past camera; great shot speed boat bouncing over the swells.
04:39:33:05 Great shot of sea sick man in yachting attire walks along rail of ship, projection of tempestuous sea projected as background.
04:39:37:26 Great tracking shot upper-class woman trotting on a white horse; wipes to woman ride trotting on a brown horse displaying proper riding technique; CU woman’s leg straddling horse bracing herself from the jolts of horse’s trot.
04:39:52:08 CU bending leather springs used on old-fashioned coaches; CU stage coach pulled by four horses rides across frame over rocky terrain.
04:40:05:02 Great shot man wearing a suit pushing down on carriage with one leg demonstrating the elliptical steel spring suspension of an antique carriage, an improvement from earlier leather springs; CU flexing steel springs of carriage; CU disembodied mans hand squeezes rubber tire of carriage wheel.
04:40:22:15 Great shot of antique turn of the twentieth century car, man wearing a suit enters frame carrying a hammer, man hammers the tire demonstrating the improvement of the pneumatic rubber tire for automobiles; CU disembodied hand hammers tire; CU disembodied arm points to headlights of on front of car from around 1920, hand then touches the hydraulic shock; CU back of antique 1920s car bobbing back and forth; CU front fire of moving car from around 1925 highlighting the first use of balloon tires; great tracking shot man driving down 1920s road through tree-lined rich neighborhood.
04:41:05:06 VS passengers bouncing up and down in back of car as it rides over a bumpy country road; great shot passengers bouncing inside of car.
04:42:14:02 Great shot mechanic inspects car stripped of any for of shock absorption, metal discs for tires, not seat cushions, no shocks; passenger enters back seat of car; lamps are installed to face camera from various points in the car, including on the driver to show the shock; great shot of jagged traces of light left behind as car moves across frame in motion study; mechanic reinstalls tires, cushions and shocks onto car, same test is done with lights in darkened car, three flat lines spread across screen as car moves across frame illustrating smoothness of the ride.
04:44:00:12 Great split screen divided horizontally, compares modern 1930s suspensions system with older 1920s steel springs, car on top bounces violently on bumpy road while bottom car rides smoothly over the same bumpy road.
04:44:16:11 CU front of car driving over railroad track, Michigan license plate over car bumper; cuts to track shot of two men doing handstands on hood of the car as one holds men’s legs up; two men climb onto the roof of the car and lift woman onto their shoulders, woman precariously gains her balance; tracking shot of woman on men’s shoulder atop car driving over train tracks passing large power lines.